Daniel, Sheila

I powered off the 79.2 MHz fixed frequency source in the CER ISC C4 rack.  There were two long cables connected to this, one of which was in patch panel 1, signal 2 (see page 10 of the RF distribution plan). This cable was not in the plan, but had a handwritted masking tape label that said ALS COMM VCO.  It went to the long cable that should have been labeled 10-2 (the label seems to have fallen off).  This went to the field rack R4, where it was similarly labeled and had a cable attached that was just dangling in the rack.  This cable has been removed, and the long cable is terminated at both ends.  the cable which is in the RF distribution plan is still in place and terminated in R2.  

This should mean that there is one less frequency to cause the type of wandering lines seen in alog 17506.  

We think that we have now made some efforts that should mitigate the three types of glitches that have been pointed out so far.  

2^16 crossing DAC glitches alog 17654 reducing the range needed for ETMY and turning off the linearization alog 17713

tidal nitting software limiter: 17555 saturations in tidal should be less common now that we have re done the way that we engage the tidal while locking ALS 17624.  Dan also has written a tool that could be used to alert us when something is close to its software limit, 17791.  We could also think of adding only a few of these filter banks to the sys diag guardian.